Pinking machine



Feb. 9, 1937. H. c. HERscHMAN PINKING MACHINE Filed NOV. 14, 1936 Patented Feb. 9, 1937 UNITE-'D STATES PINKING MACHINE Harry C. Herschman, Wheaton,'lll.

Application*November `14, 1936, SerialHNo.' 110,917

"6 Claims.

This invention relates to pinking machines for cutting a wavy non-ravelling edge in fabricarticles. In garments, a generous strip ,.offabric. is provided at theseams for futureralteration. Be-

.xcause of the tendency, to unravel, itis customary to trim the raw'fabric'tor azwavyorspinked edge.

The machine-disclosed herein accomplishes the above and makes it impossible for an operatorxto trim- 01T more than ;a narrow strip fromthe Loffabric. `In machinesofthe present time, it is necessary for thegoperator to `watch ther'guiding of the fabric into the machine carefully. :If the operators attention wavers,` it v'frequently `happens kthat the fabric will be cut deeper thandelalsirable and may even-,spoil the entire article. Furthermora in machines `inuse, the cutter is above the .work plateand constitutes -an ever present danger to thejfingers` Because Yofthe tortuous cutting edge, any careless touchingof Z0 the cutter while in motiondraws theflngersinto cutting position.

An object kof this inventionis" to devise a' machine that will be'simple; cheap, positive in action and will only cut off a predetermined narrow strip of fabric. A further object is to devise a machine that will be safe to operate, will present a smooth revolving surface above the workplate and will tend to push out of danger any article or nger laid on the cutting roller.

Other and additional objects will appear as the description proceeds.

Referring to the drawing:

Figure 1 is a side elevation View, partly in section of the machine.

Figure 2 is a detail of the drive.

Figure 3 is a view of a piece of fabric pinked by the machine.

The machine comprises a base I of cast iron or other material having legs 2 and 3. Carried by base I is a housing 4 in the upper part of which are carried journals 5 and 6. Rotatably mounted in said journals is a drive shaft l. This drive shaft projects beyond the confines of housing 4 and on the outside thereof carries a pulley I0.

Shaft 1 carries a worm I I between the journals 5 and 6. A worm gear I2 engaging worm II is provided and this gear is rigidly mounted on a vertical shaft I3. Shaft I3 is supported at the g bottom in a thrust bearing l5 carried by base I and at the top in a bearing I6 carried by a plate I1 rigidly mounted on housing 4.

Near the bottom of shaft I3 is a bevel gear 20 turned thereby and engaging bevel gear 2| carried by horizontal shaft 22. This shaft is car- 5 ried by bearings 23 and 24 on base I. Shaft 22 extends out of housingllan'd carries. on the end thereof a roller"=25` having 'a'iiangelfZG extending therefrom on one-side. "Roller '25 ismounted above a slotx28-in base I and ange `26 of the roller is adapted to extend into-said slot. It-will 5 be noted that; the linefof contact between the smooth roller andvcutter is ikjustlslightlyabove the -top surface of base I and that flangef 261 is snug-againstthe inside Aof cutter38.

Shaft'22-also carries-a-gea1-30 adjacent bevel `10 gear 2 I. `This gear30meshes with-a similar gear 3|r carriedebysshaft32. This shaft is disposed belowbase Iand is generally horizontal. One end'of-shaft 32 is supported in a bearing-33 pivotally Vmounted at 134 lfrom a 'pairof lugs 135 15 (only one of which'appears) supported by base I. Shaft `32 carries `a pinking cutter 'f 38 having -the usual tortuouscutting-edge-39. A Shaft 32 is supported at the cuttingend byaffloating bearing 40. Bearingfl has pins-4I extending from thesides 20 thereof Awhichrride in recesses-12 of lugs 43 carried bylbasei I. It'will be noted thatbearing 40 is' *movable up-r and down andwis resiliently supported against lugs 43 by arm 45 pivoted at 4B to a member 41 depending from base I. Arm 45 25 carries a rigid lever 50 at the end thereof and this lever has a threaded end 5I engaging a screw 52. Screw 52 is turned by knob 53 in sleeve 54 and causes threaded end 5I to travel up and down on it. A housing 60 for the pulley is carried 30 by housing 4U.

What is claimed is:

1. A machine of the character described comprising a base, a horizontal shaft mounted above said base, a smooth roller carried by said shaft 35 and having a flange at the inner edge thereof only, said roller extending down near the top of said base and the flange extending down through a slot into said base, a second shaft mounted below said base, a pinking cutter carried by said 40 second shaft and having an active cutting portion extending up through said slot in said base and engaging the smooth surface of said roller and means for turning said cutter to pull fabric through between the roller and cutter, the line 45 of engagement between said cutter and smooth roller being just enough above the base to accommodate the fabric operated upon.

2. A machine of the character described comprising a base, a horizontal shaft mounted above 50 said base, a smooth roller carried by said shaft and having an outwardly extending flange along the inside edge thereof only, said roller extending down near the top of said base with the ange extending through a slot in said base, a second 55 shaft mounted below said base, a pinking cutter carried by said second shaft and having an active cutting portion extending up through a slot in said base and engaging the smooth portion of said roller and means for synchronously turning said cutter and roller to pull fabric therethrough, the line of engagement between said cutter and smooth roller being just enough above the base to accommodate the fabric operated upon. Y

3. A machineofthe'character described comprising a base, a horizontal shaft mounted above said base, a smooth roller carried by said shaft and having an outwardly extending flange along the inner edge thereof only, said roller extending down near the top of said base with the ange extending through a slot into said base, a second shaft mounted below said base, a pinking cutter carried by said second shaft and having an active cutting portion extending up through said slot in said base to engage said smooth roller, means for mounting said lower shaft whereby the cutter end is adjustable to and from said roller, and means for turning said cutter against said roller to pull fabric through between the cutter and roller, the line of engagement between said cutter and smooth roller being just enough above the base to accommodate the fabric operated upon.

4, A machineof the character described comprising a base, a horizontal shaft Amounted above said base, a smooth roller carried by said shaft and having an outwardly extending flange from the inner edge thereof only, said roller extending down near the top of said base with the flange extending through a slot into said base, a second shaft mounted below said base, a pinking cutter carried by said second shaft and having an active cutting portion extending up through said slot in said base and engaging saidA smooth roller, means for mounting said cutter and shaft whereby said cutter is adjustable to and kfrom said roller, and means for` turning saidlcutter to pull fabric through between the roller and cutter,

the line of engagement between said cutter and smooth roller being just enough above the base to accommodate the fabric operated upon.

5. A machine of the character described comprising a base, a horizontal shaft mounted above said base, a smooth roller carried by said shaft having an outwardly extending ange from the inner edge thereof only, said roller extending down near the top of said base with the flange extending down through a slot into said base, a second shaft mounted below said base, a pinking cutter carried by said second shaft and having an active cutting portion extending up through said slot in said base, means for mounting one of said shafts to permit a predetermined separation of said roller and cutter, resilient means urging said two together, and means for turning said cutter to pull fabric through between the cutter and roller, the line of engagement between said cutter and smooth roller being just enough above the base to accommodate the fabric operated upon.

6. A machine of the character described comprising a base, a horizontal shaft mounted above said base, a smooth roller carried by said shaft and having an outwardly extending flange from the inner edge thereof only, said roller extending down near the top of said base with the flange extending'through a slot into said base, a second shaft mounted below said base, a pinking cutter carried by said second shaft and having an active cutting portion extending up through said slot in said base and frictionally engaging said roller surface, means for mounting said cutter shaft to permit a predetermined separation of said cutter from said roller, and means for synchronously turning said cutter and roller to pull fabric therethrough, the line of engagement between said cutter and smooth roller being just enough above the base to accommodate the fabric operated upon.

HARRY C. HERSCI-IMAN` 

